A mum in the UK has hit back against airline staff who she claims mocked her daughter's name while the family was boarding a plane.

Traci Redford's daughter is named Abcde and is pronounced Ab-city.

Abcde, five, has epilepsy. Traci says they were boarding their flight home after a holiday in Orange County, California, earlier this month when the incident occurred.

Unfortunately Abcde heard the comments, leaving her "distraught".

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"She said, 'Mum, why is she laughing at my name,'" Traci tells ABC. "And I said not everyone is nice and not everyone is going to be nice and it's unfortunate."

The mum alleges the check-in agent also laughed at her daughter's name when they arrived at John Wayne Airport.

"The gate agent started laughing, pointing at me and my daughter, talking to other employees," she explained. "So I turned around and said, 'Hey if I can hear you, my daughter can hear you, so I'd appreciate it if you'd just stop’."

In fact the distraught mum claims a copy of her daughter's boarding pass was shared on Facebook by that worker.

"While I was sitting there, she took a picture of my boarding pass and chose to post it on social media, mocking my daughter," she claimed. "It was actually brought to my attention by somebody who had seen it on Facebook and reported it to Southwest Airlines."

Traci and daughter Abcde. (Supplied)

She says it took two weeks for the airline to issue the following apology:

"We extend our sincere apology to the family. We take great pride in extending our Southwest Hospitality to all of our Customers, which includes living by the Golden Rule and treating every individual with respect, in person or online.

"The post is not indicative of the care, respect, and civility we expect from all of our Employees.

"We have followed up with the Employee involved, and while we do not disclose personnel actions publicly, we are using this as an opportunity to reinforce our policies and emphasise our expectations for all Employees," the company said in a statement.